Demountable rim.



, from the fixed rim o j v.plished without consin, have invented new ,i in demountable 10 E fr .ALLAN J'. PARK, OF MADISON, WISCONSIN.

DEMOUNTABLE RIM.

- 4 Application :ned March 25, 1916.

To all whom t may concern Be it known that I,`ALL.I\.N J. PARK, a citizen of the' United States, residinfr at Madison, countyof Dane, and State of tVisand useful Tmprovements in Demountable Rims, of which the following is a specification.

My invention relates to the improvement rims for pneumathtire casings. j

The object of my invention is to provide a rim which can bemore easily applied to and removed from a tire casing than those heretofore used. liforespecifically stated, the object of myvinve'ntion is to provide. a simple and compact'means whereby the rim may be formed in separable sections which interlock with each other in' such a manner that the meeting ends of two g be swung inwardly when the rim is detached fthe vehicle wheel, the inwardly swinging movement being accomdepending uponA resilience vor flexibility in the material composing the `is sufhcient when the "showing the rim. The single holding member employed Iat the point where thewlnwardly swinging niay be utilized and said member is in holding positionto prevent such movement.

In the drawings'- Figure 1 is a` perspective view of a demountable rim embodying my invention,

several sections detached.

Fig. 2 is a plan viewof a fragment of the rim, showing the joint at which the final "mounting or initial demounting movement takes place.

Fig. 3 is a sectional view drawn on line 3-3 of Fig. 2.

Fig. 4L is a. plan view showing fragments of the two meeting sections connected with one of the auxiliary interlocking joints.

Fig. 5 is a longitudinal sectional view.on line 5-5 of Fig. 4.

Fig. 6 is a side elevation section swung inwardly to a at the point where the initial separation originates. t

Like parts are identified by the/same reference characters throughout the several views.

movement commences showing one slight extent movement of The members 1, 2 and body of the rim. They are provided with side anges 4, which may be. ol' any ordinary sections may 4from the end section in man I. Speeif-eaton of Letters Patent.

Patented Mar.

Serial No. 86,687'.

contour adapted to engage the bead or edge of the tirey casing. The. rim section 1, is inwardly offset 'near one end as shown at 6, thereby forming a shallow recess 7 which is best shown in Fig. 5. At the outer end of this recess, the section 1 is provided with a tongue 8, outwardly offset from the base of the recess and projecting longitudinally a. continuation of the are of curvature of the body portion 1. The tongue Sis adapted to be manipulated through a slot -10 formed near one end of the section 3, whereby when the two sections are swung into alinement, the tongue 8 may be engaged in the shallow recess 11 formed by the downwardly otfsetting portion 12 of the body of section 3 adjacent to the slot l0. The transverse dimension of the slot '10 and also that of the recess tongue 8.

the body 3 is extended 1n the form of a lip 13 which, when the sections are alined, lls the recess 7.

rlhe end of the section 2 is provided with a downwardly offset portion 16 .similar to the otl'set., -6.l Italso has a tongue 18, simi- Beyond the slot IO vlar in form and function to the tongue 8 above described. The tongue 18 is adapted to pass through the slot 20 and enter the recess 21 in the end portion opposite that end which has and at this opposite end. the section 1 is provided with a recess 22 to receive the lip 23 which is adapted to be received in the recess 16. The interlocking engagement of the sections 1 and 2 is therefore similar to the interlocking engagements 1 and 3, although the interlocking members are reversed.

The opposite ends of the sections 2 and 3 from those above described are straightedged and adapted for abutting contact with each other at the edge ma rgins 21, 25.` The section 3 is provided with a transverse slot 26 near the margin 25, and the section 2 is provided with a. projecting tongue 27 having an interlocking offset 28 adapted to enter slot 2G when these two sections, 2 and 3. are brought into abutting cont-act at the edges 24 and 25. The tongue 27 is preferably riveted to the inner surface of section 2 near e edge margin'25 thereof and the, interlocking portion 28 of the tongue is outwardly otfset'to a position in the arc of curyature of section 2. When this portion 28 is interlocklng position in slot 26, it

of the section f the tongue 8 may be secured in such position by an ordinary turn button 30, pivoted to the section 3 at 31, and adapted to be swung to the posi- .tioii indicated by the dotted lines in Fig. 5 2i whereupon it overlaps the iiinei` tace' ot' the interlocking member ZSand prevents the latter t'roni disengaging from slot 2G. :5l is an aperture to receive the tire nipple. 3 2 designates slots formed in the meeting eX- treinities ot the sections 2 and R near the side flanges toy t'acilitate expanding the rim within the tire casing. pertures 3i are -toi-ined in the lianges Jr to receive the side clips ivher'ebyllhe demoiiiitable .rini is sei cured in position on the fixed rini of the wheel.

lo insert my improved demountable rim within a' tire. the sections .2 and 3 may be interlocked with section i by manil'iulating tongues S and 1S tli'rough the slots l() and 20 and then swinging the sections into an approximate common are of curvature. By moving the free ends ot' the sectionsl 2 and 3 inwardly the rim may then be readily insei-ted within the tire casing` after which it may be. expanded in the ordinary manner by means of a tool engaging in holes IH or in the notches 32. When sul'lieiently expanded within the tire casing, the interlocking tongue portion le will register with the slots 2(3. Section 21 which has theretoforel been swung inwardly to allow this interlocking portion 28 to lap upon the inner face of section 23, may now be pushed outwardly' until the member '2% enters theA slot 26, whereupon button 30 may be swung to the position indicated by dotted lines in Fig.- .2, thereby completing the operation. To release the rim fronrthe tire Casing it isv 40 merely necessary to reverse the. manipulation above described. Button 3() will lirst be swung to releasing position, whereupon section 2 may hepiished or driven inwardly until member 28 disengages from slot 2(5,-

whereupon sections "2 and 3 may readily be collapsed inwardly and disengaged from section l.

ciaim- A demountable rim comprisii'ig a plurality-of interlocking sections two of which are adapted to be manipulated into interlocking engagement with a-third section; said irst mentioned'two sections having abutting marginal portions, one -ot` which is provided with an inwardly otset tongue having an outwardly offset extremity adapted for interlocking engagement in said slot, and adjustable means adapted to retain said outwardly otl'set portion of the tongue in engagement with said slot when in interlocking position therein.

2. demouirtable i'iiii comprising the combination ot a plurality of sections two of which have meeting end portions adapted to move radially into interlocking engagement, and a third section having 'its ends adapted to respectively engage the other ends of the iii-st mentioned two sections`r the meeting ends otl the third section and the other two sections being provided with interlocking counterpart members adapted to be inanipulatet'l'into mutual engagement by a swinging motion Aot one section upon the other.

3. A demountable rim comprising a combination of a. plurality of sections two ot which have meeting end portions adapted to move radially into interlocking engagement, andl a third section having its ends adapted to respectively engage the other ends ot' the first' mentioned two sections, the meeting ends ot the third section and the other two sections being provided with interlocking counterpart members adapted to be manipulated into mutual engagement by a swinging motion ot onesection upon the other, one ot' the meeting end portions of said sections being provided with a slot through which the tongue on one ol the other seetions may be nianipulateth and also having a recess adjacent to said slot adapted to receive the tongue, substantially as described.

In testimony whereof I aliiX my signature in the presence of two witnesses.

' ALLAN J. PARK.

Witnesses Flinn. M. BROWN, HENRY L. TUMILL. 

